Pulley wheel



luy 13 1926.

c.I R. BRANsoN PULLEY WHEEL Filed June v, 1923 FIG. 5.

IN VEN TOR.

f I m ATTORNEYS.

Patented July 13, 1926.

uniti-:n stares isa-2,255

risica.

safrang '.PULLEY WHEEL;

" VAmnieation filed June 7,

This invention relates to sheaves, and puls ley wheels. The objects of the inventionri'nclude the productionof a sheave or pulleyT wheel with provisions for antifriction devices combined therewith; the production of a sheave or pulley'wvheel with a plurality of independent antitriction devices, whereby an interference with the operation of one, will still leave o-ne to function. Y Other, and incidental, objects and features will develop as 'the description progresses.

. 1n the accompanying one sheetof drawing l have illustrated a shea-ve containing my invention. The block, or housing, in which the sheave operates, i'orming no part of the invention, is not illustrated.

Figure 1 is a face view of a sheave, one of the Jtace rings being partly broken away to show the ball bearings behind it, and one ot the central face plates being omitted to show the roller bearings.

Figure 2 is an axial section, on the line 2, 2 otligure 1.

Figure 3 is av face View of a roller bearmg. Y

Figure 11 is an end View of Figure 3.

Figure is an elevation view ot an auxillary, or spacing roll.

Figure 6 is an end view of Figure 5.

Referring to the drawing and the figures thereof:W

The outer member of the sheave is in form ot an annulus 1, the outer face ot which is shown as concaved to receive a rope or cable, not shown, it such be used with it. (lr the face may be. otherwise shaped to match whatever form of member engages it.

The inner periphery of the annulus, is alsoconcaved, asfat 2, to form a runway for the ball hearings l/Vithin the annular member 1, is an annular block member 4- whose outer periphery is. concaved as at 5 to receive the balls 3 which travel around on it, between it and the member 1, thus constituting an antitriction bearing atV that point.

On each side of the eoncavity 5 is a shoulder 6V against which bears the inner edge ot a flat ring 7, whose outer ,edgel bears against a similar shoulder on each side ot the concavity 2, Screws 8 secure the rings 7 to the member 1, thus maintaining the members 1 and 4f in concentric relation.

At any suitable point the shoulder 6 of concavities 2 and 5 are cut away, as indicated by dot-ted lines at 9 and 10 in Figures 1923. Ser-iat No. 643,911.

1 and E2, to permit the insertion and withdra-wal ot the balls 3. They inner periphery ot' member a is plain, and litting against it is the'oute periphery of an annular member 11, having an angular projecting edge 12. (ln the interior tace ot member 11, is a circular and concentric groove 13, to receive the trunnions 1a on the ends or rollers 15, which will be presently described, a circular plate 16 having a hole in the middle at 17 is fitted to the sheave or pulley against the open side ot member 11, and is secured by screws 18 entering the member t. The hole 1,7 registers with a central hole 19 in member 11, the two holes designed :tor the passage ot the wheel arbor or shaft, not shown. On the inner tace of plate 16 is circular groove 20, registering in position with groove 13, and intended for the same purpose. Encircling groove 20 is a second circular groove 21, adapted to receive the edge12 of member 11.

Rollers 15 constitute an antitriction bearing for the member 11, upon the wheel arbor, not shown. The trunnions 14 at the ends of each roller 15 run in the grooves 13 and 20, and prevent any roller from dropping toward the center, when the arbor is withdrawn. Between each two adjacent rollers 15, I position small rolls 22 which bear against rollers V15 and against member 11 and serve as spacers to keep rollers 15 trom c contacting each other.

Having thus described my invention, and an embodiment of it, in the full, clear and exact terms required by law, and knowing that it comprises novel, useful and valuable improvements in the art to which it pertains, I here state that I do not wish to be limited to the precise construction and arrangement of the several parts, as herein set forth, as

the same may be variously modified by a c ball race, bearing balls between said an-V nulus and second member having substantially point contact therebetween and a first or inner member provided with a series of anti-friction rolls, trunnions on said rolls and annular grooves in which said trunnions travel, spacers between said rolls, side plates adapted to maintain said outer and second members in concentric relation and cover the space therebetween, said annulus and` first and second member revoluble independently of each other.

2. A palle)v wheel comprising, an annulus or outer member. a second concentric member having a ball race, bearing balls between said members havingsubstantially point contact therebetween, a first or inner concentric member provided with an arbor opening, said inner member provided with a series of anti-friction rolls, annular grooves in said inner member, trunnions on said anti-friction rolls adapted to travel in said grooves, spacers between said rolls and lateral removable flat rings secured between said outer and second members to cover the space therebetween, and maintain said outer and second members in concentric relation.

3. A pulle)Y wheel comprising;r three concentric members, the outer one oi' which 'forms an annulus, said annulus provided with a ball race, a second member having a ball race, bearing balls havinc,r silbetantially7 point contact in said races and a lirst or inner member provided with a series ol antifriction rolls, trunnions on said rolls and annular grooves in which said trunnions travel, spacers between said rolls and means to maintain said outer and second members in concentric relation.

In testimony that I claim the foregoing I have hereto set my hand this 1st day of June, 1923.

CHARLES R. BRANSON. 

